I am looking to create a Maximum-Value Composite raster in QGIS
I have three raster images: Oct 2012 Nov 2012 Dec 2012 All are in TIFF Format, Float32, EPSG:4326 - WGS 84
I want to stack these images, then on a pixel-by-pixel basis,examine each value, and retain only the highest value for that pixel location to create a Maximum-Value Composite (refer to http://en.wikipedia.org/wiki/Maximum-value_composite_procedure)
e.g.(these are made-up numbers for illustrative purposes):
Pixel in Row 205 and Column 106 will have three values: 90 75 100
I want to choose 100, then move to the next pixel and do the same. In the end I should have a final raster with maximum values only, a maximum value composite!
I am have QGIS 1.8.0 & 2.0.1, GRASS 6.4.3RC2 and SAGA 2.0.8 at my disposal.